Development of a Simple Method for Testing Visual Acuity on Severely Handicapped Children

我们通常用朗多尔环法测试视力。但是测试严重残疾儿童的视力是困难的，因为他们必须说出方法中一些环的方向。我们一直在开发的一种新方法是不用说的。在这种方法中，眼睛的视觉敏锐度是根据眼睛的照片或摄像机作品来判断的。当存储器在黑暗中在眼睛上闪烁时，该设备将眼睛记录在电影或录像带上。然后我们可以从中发现折射的异常。我们用这种方法检查了374人。该结果与自动折射仪的测量结果密切相关（相关系数为0.889）。我们试着检查150个残疾儿童，成功地测试了148个孩子。

We usually use the Landolt Ring method for testing visual acuity. But it is difficult to test visual acuity of severely handicapped children, since they must say about the direction of some rings in the method. A new method which we have been developing doesn't have necessity of saying. On this method,the eyes are judged visual acuity from the pictures or video camera works of them. When the storobe flashes on the eyes in the dark,this device records the eyes on films or video tapes. Then we can find the anomalies of refraction from them. We examined 374people by this method. The result of this correlated closely with he result of Auto Refractomater (correlation coefficcent ; 0.889). And we tried to examine 150 andicapped children, and succeeded to test 148 children.